How much protein is in roasted chicken breast (skinless)?

Roasted chicken breast (skinless) has 31 g of protein per 100 g and 26.7 g per 0.5 breast, bone and skin removed (86 g). That is 18.8 g of protein per 100 kcal — a high-protein food by any standard.

Should chicken breast be weighed raw or cooked?

Weigh it in whichever state you log it, and use the row that matches — this page is the cooked row. Cooking does not change how many calories are there, only how many grams they are spread across: meat loses water in the pan and gets denser, grains and pasta absorb it and get lighter per gram.

All foods

Chicken breastUSDA SR LegacyFDC 171477

Calories in roasted chicken breast (skinless)

USDA FoodData Central record for “Chicken, broilers or fryers, breast, meat only, cooked, roasted” — per 100 g, per every USDA serving size, and next to the other chicken breast rows.

The short answer

Roasted chicken breast (skinless): 165 kcal per 100 g. 0.5 breast, bone and skin removed (86 g) is 142 kcal with 26.7 g of protein. Source: USDA FoodData Central record 171477, "Chicken, broilers or fryers, breast, meat only, cooked, roasted".

Per 100 g

Nutrient	Per 100 g	Share of energy
Energy	165 kcal	100%
Protein	31 g	75%
Fat	3.6 g	20%
Carbohydrate	0 g	0%

Roasted chicken breast (skinless) is 165 kcal per 100 g in USDA FoodData Central (SR Legacy). Of that energy, about 75% comes from protein, 20% from fat and 0% from carbohydrate. That works out to 18.8 g of protein per 100 kcal — a high-protein food by any standard.

Per serving

The serving sizes USDA lists for this record, priced from the per-100 g figures above. Nothing here is rounded to a “portion” — the gram weight next to each label is what the calories are computed from.

Serving	Weight	Calories	Protein	Fat
100 g	100 g	165	31 g	3.6 g
1 cup, chopped or diced	140 g	231	43.4 g	5 g
1 unit (yield from 1 lb ready-to-cook chicken)	52 g	86	16.1 g	1.9 g
0.5 breast, bone and skin removed	86 g	142	26.7 g	3.1 g

Compared with other chicken breast

Food	kcal / 100 g	Protein / 100 g	Per serving
Raw chicken breast (skinless)	120	22.5 g	136 kcal · 4 oz
Roasted chicken breast (skinless)	165	31 g	142 kcal · 0.5 breast, bone and skin removed
Fried chicken breast (skinless)	187	33.4 g	161 kcal · 0.5 breast, bone and skin removed
Roasted chicken breast with skin	197	29.8 g	276 kcal · 1 cup, chopped or diced
Raw chicken breast with skin	172	20.9 g	150 kcal · 0.5 breast, bone removed (yield from 1 lb ready-to-cook chicken)

The chicken breast rows exist in more than one state because water moves during cooking: this is the cooked row. Weigh the food in the state you log and pick the row that matches — the calories don’t change in the pan, the grams do. The mechanics are in cooked vs raw weights.

Worth knowing

The most-quoted chicken number: 165 kcal and 31 g protein per 100 g. It applies to cooked meat without skin. About 19 g of protein per 100 kcal makes it one of the best protein-per-calorie whole foods there is.

Other tables in poultry products

The same numbers for the foods this one usually shares a plate — or a shopping list — with.

Questions about roasted chicken breast (skinless)

How many calories are in roasted chicken breast (skinless)?: Roasted chicken breast (skinless): 165 kcal per 100 g. 0.5 breast, bone and skin removed (86 g) is 142 kcal with 26.7 g of protein. Source: USDA FoodData Central record 171477, "Chicken, broilers or fryers, breast, meat only, cooked, roasted".
How much protein is in roasted chicken breast (skinless)?: Roasted chicken breast (skinless) has 31 g of protein per 100 g and 26.7 g per 0.5 breast, bone and skin removed (86 g). That is 18.8 g of protein per 100 kcal — a high-protein food by any standard.
Should chicken breast be weighed raw or cooked?: Weigh it in whichever state you log it, and use the row that matches — this page is the cooked row. Cooking does not change how many calories are there, only how many grams they are spread across: meat loses water in the pan and gets denser, grains and pasta absorb it and get lighter per gram.

How calorie.one logs it

Type “roasted chicken breast (skinless)” into calorie.one and the app matches this exact record — “Chicken, broilers or fryers, breast, meat only, cooked, roasted” — estimates the grams, and shows the line with its USDA label. You correct the amount; the per-100 g figure is never guessed. That split between recognition and arithmetic is the whole methodology. For the numbers in context, read Calories in chicken breast: raw, cooked, skin on and off.